Monkey-wrench.



PATENTED DEC. 1( 1907.

013; G. c. VAN HORN. MONKEY WRENCH.

APPLICATION FILED APB. 25.1907.

INVENTOBL? C/zarles Van Harm.

WITNESSES 4 8 aVbnHor-m.

ATTORNEYS To all whom it may concern: I 'Be it known that we, CHARLES VAN HORN- and GEORGE C. VAN HORN, citizens of the the county of Hudson and State UNITED STATES PATENT OFFICE.

CHARLES VAN HORN, OF BETHLEHEM, PENNSYLVANIA, AND GEORGE C. VAN HORN, OF

- JERSEY CITY, NEW JERSEY. v

MONKEY-WRENCH.

Specification of Letters Patent.

' Patented Dec. 10, 1907.

Application filed April as. 1901. Saris-1N0- 370-435;.

United States, residing, res Bethlehem, in the county of State of Pennsylvania,

'ectively, at orthampton, and Jerse .City, in

New Jersey, have invented certain new and useful Im rovements in Monkey-Wrenches, of which the following is a specification, such as will enable those skilled in the art to which it a pertains to make and use the same.

s invention relates to monkey wrenches and the object thereof 'is to provide an improved device ofthis class with improved means for lockin the movable jaw at any desired point 'of a justment which involves a rack bar on the shank of the wrench, and an from ressing on the teeth of the rack bar adjustable pawl or tang connected with the movable jawand operating in connection with said rack bar, the jaw and rack bar being so formed as to prevent-thesaid jaw and t us wearing and rendering the same ino erative. he invention is fully disclosed in the following specification, of which the accompan '11 drawin forms a art, in which the Y o g P separate parts of our improvement are designated by suitable reference characters in each of the views, and in which Figure l is a sectional side view of my improved wrench, and Fig. 2 a section on the ine 22 of Fi 1. a

In the practice of our invention we provide a wrench composed in the main of a shank member a provided at one side with a handle a and at the opposite end with a stationary jaw it together with a movable jaw b which is mounted on the shank a and ada ted to be adjusted thereon at any .desirer point. i

The face side of the shank a is prow'ded with a central longitudinal rack or ratchet bar a which is formed integrally therewith and at each side of which is a groove 0 formed in the shank a, and the movable jaw b is provided with longitudinally arranged ribs b which fit in the grooves a and bear on the main part of the shank'a and prevent the movable jaw from bearing on the top of the rack or ratchet bar a, this construction being clearly shown in Figs. 1 and 2.

The movable jaw b is rovided with backwardl y directed ears between which 1s pivoted a locking arm e having a cam head 0, the pivot of the arm e be1n -made by means of a rod or bolt e passed t cam head e jaw 12 and by means of the arm e the 'aw b may be locked at any desired point of a justment on the shanka. j That side of the movable jaw'b adjacent to oughthe and the ears (1. of the movable the handle a 'of the wrench is provided with a tang f consisting of a plate having a central longitudinal slot through which is passed a screw 9 by which said tang is connected with wrenc when said 76.

said jaw, and said tang is adapted to. operate I 1n connection with the teeth of the rack or connection with the By means of our improvement it will be seen that the jaw b does not bear on the teeth. of the rack or ratchet'bar c and said teeth are]. thus preserved against wear in the use of the wrench. The arm e is shown in locking or partial locking position in Fig. 1 and whenever it is desired to adjust the jaw b .on the shank a the said arm must be swung back toward the stationary jaw c of the wrench,

and the movable jaw may then be moved freely on the shank a and adjusted to any desired point.

It will beobserved that the tang or pawl f may also bewadjusted but this adjustment of said tang or pawl is not necessary in the ad-- justment of thesjaw b as said jaw is free to move laterally sufliciently to ermit the tang, or pawl f to slideoverthe teet of the ratchet or rack bare when the arnie is swung into its inoperative position.

Having fully described our invention, what we claim as new and desire to secure 1 y Letters Patent, is

A monkey wrench provided with the usual movable jaw slidably mounted on the shank of the wrench, the shank of the wrench being provided on the face thereof with a rack or ratchet bar at the opposite sides of which are longitudinal rooves, the movable jaw bein also provide with side ribs which fit in em grooves, the transverse depth or thickness of said ribs being greater than the transverse depth of said grooves whereby the said mov ab e jaw is prevented from bearing on the,

teeth of the rack or ratchet bar, and means for locking said jaw to theshank of the In testimony that We claim the foregoing wrench at any desired point, consisting of a as our invention we have signed our names in tang mounted on the face of the movable presence of the subscribing witnesses this jaw adjacent to the handle and adjustable 20th day of April 1907.

5 transversely of the shank of the Wrench and CHARLES VAN HORN.

ada ted to operate 1n connection Wlth the 1 T V teeth of the rack or ratchet bar, and an arm GEORGE VA} HORN ivoted in the back portion. of the movable Witnesses:

aw and provided with a cam head adapted LOUIS BRENDEL,

10 to bear on the shank of the wrench. MARTIN V. SOHERRER. 

